Automobile rear drive axle assembly

Abstract

The invention discloses an automobile rear drive axle assembly comprising a rear drive axle housing assembly, a half axle and a main reducer assembly including a connecting flange, a main reducer housing, and a group having a driving bevel gear, a driven bevel gear, and a differential assembly which are disposed in the main reducer housing. The connecting flange is fixed to the driving bevel gear.The driven bevel gear is meshed with the driving bevel gear. The differential assembly includes a differential housing, half axle gears and four planetary gears. Each planetary gear is meshed with two half axle gears. The outer end portion of the half axle passes through the left and right end portions of the rear drive axle housing assembly and is detachably fixed to a tire. The driven bevel gear is detachably fixed to the differential housing. The connecting flange and the driving bevel gear are located at a position above the center of the rear drive axle housing. The driven bevel gear andthe differential assembly are located in the middle of the rear drive axle housing. The automobile rear drive axle assembly of the invention is simple in structure, reduces howling during the drivingprocess of the automobile, prolongs the service lives of the planetary gears, is stable in torque transmission, avoids resonance, and improves the NVH performance and ride comfort of the vehicle.

Description

technical field [0001] The invention relates to an automobile rear drive, in particular to an automobile rear drive axle assembly. Background technique [0002] The existing automobile rear drive axle assembly includes the main reducer assembly, and the existing main reducer assembly is composed of the half shaft gear in the differential housing inside the differential housing in the driving device and the The two planetary gears are connected, so that the force on each planetary gear is relatively large during the rotation of the half shaft, and the main teeth convert the rapid rotation into the slow rotation of the half shaft, reducing the rotation speed, and the torque increases during the secondary process, and When the torque direction is changed, the torque transmitted by the planetary gear is not stable during the process of changing the torque, which makes the two half shafts connected to it vibrate and vibrate, resulting in howling and resonance, which reduces the N...

AI Technical Summary

Problems solved by technology

[0002] The existing automobile rear drive axle assembly includes the main reducer assembly, and the existing main reducer assembly is composed of the half shaft gear in the differential housing inside the differential housing in the driving device and the The two planetary gears are connected, so that the force on each planetary gear is relatively large during the rotation of the half shaft, and the main teeth convert the rapid rotation into the slow rotation of the half shaft, reducing the rotation speed, and the torque increases during the secondary process, and Changing the torque direction, the planetary gear transmits torque unstable during the torque conversion process, causing the two half shafts connected to it to vibrate and vibrate, resulting in howling and resonance, reducing the NVH performance and ride comfort of the vehicle

Moreover, the size of the assembly process hole opened on the differential housing is relatively large, which reduces the strength and rigidity of the differential housing, reduces the impact resistance of the differential housing, and reduces the overall strength and strength of the overall rear axle drive. and shorten the service life of the rear axle drive

In addition, the traditional independent main reducer differential bearings are adjusted by adjusting shims. Once installed, it is difficult to adjust the tooth side clearance and difficult to control. If the first assembly fails, it is necessary to re-select shims of different thicknesses and disassemble them again. The installation efficiency Low, and the improper adjustment of the backlash of the teeth will lead to a deviation in the meshing position of the main teeth and the driven teeth, which will cause whistling when the car is running

[0003] However, the existing rear axle reinforcement plates are more, the pipe diameter changes unevenly, there are more welds, and the welding quality is unstable, which easily leads to stress concentration and low axle housing mode.

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